reworking git structure

Models/Author.cs

@@ -0,0 +1,35 @@
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+
+namespace Example.Models
+{
+    public class Author
+    {
+        public Author() {}
+        
+        public Author(string firstName, string lastName, DateTime birthdate)
+        {
+            FirstName = firstName;
+            LastName = lastName;
+            Birthdate = birthdate;
+        }
+
+        public int Id { get; set; }
+
+        [Required]
+        [StringLength(100)]
+        [DisplayName("First name")]
+        public string FirstName { get; set; } = string.Empty;
+
+        [Required]
+        [StringLength(100)]
+        [DisplayName("Last name")]
+        public string LastName { get; set; } = string.Empty;
+
+        [DataType(DataType.Date)]
+        [DisplayName("Birthdate")]
+        public DateTime Birthdate { get; set; }
+
+        public ICollection<Review> Reviews { get; set; } = new List<Review>();
+    }
+}

Models/Book.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Example.Models
+{
+    public class Book
+    {
+        public Book() {}
+
+        public int Id { get; set; }
+
+        [Required]
+        [StringLength(200)]
+        public string Title { get; set; } = string.Empty;
+
+        [StringLength(1000)]
+        public string Summary { get; set; } = string.Empty;
+
+        [DataType(DataType.Date)]
+        public DateTime Published { get; set; }
+    }
+}

Models/ErrorViewModel.cs

@@ -0,0 +1,8 @@
+namespace Example.Models;
+
+public class ErrorViewModel
+{
+    public string? RequestId { get; set; }
+
+    public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+}

Models/Review.cs

@@ -0,0 +1,21 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Example.Models
+{
+    public class Review
+    {
+        Review() {}
+        
+        public int Id { get; set; }
+
+        [Range(1, 5)]
+        public int Stars { get; set; }
+
+        [StringLength(1000)]
+        public string Text { get; set; } = string.Empty;
+        
+        public int AuthorId { get; set; }
+        
+        public Author? Author { get; set; }
+    }
+}